emojilover2359 emojilover2359

13-03-2024
Mathematics

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An observation deck extends 455 feet out above a valley. The deck sits 405 feet above the valley floor. If an object is dropped from the observation deck, its height h in feet, after t seconds, is given by h=-16t²+405. How long will it take for the object to be 5 feet above the valley floor?

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